public class ThreadDemo10 {

    public static int count = 0;

    public static void main(String[] args) throws InterruptedException {

        //随便创建一个对象
        Object locker = new Object();

        //创建两个线程，每个线程都针对上述count变量循环自增
        Thread t1 = new Thread(() ->{
           for(int i = 0; i<500000;i++){
               synchronized (locker){
                   count++;
               }
           }
        });

        Thread t2 = new Thread(()->{
            for(int i = 0; i<500000;i++){
                synchronized (locker){
                    count++;
                }
            }
        });
        t1.start();
        t2.start();

        t1.join();
        t2.join();
        System.out.println(count);

    }
}
